/*
 * @Description:
 * @Author: zzj
 * @Date: 2021-09-24 10:00:02
 * @LastEditors: zzj
 * @LastEditTime: 2021-09-25 16:15:44
 */
let arr; //泛型
arr = ["张三", "李四", "王五"];
console.log(arr);
let set;
set = new Set(); //声明出来不能直接用
set.add(1);
set.add(2);
console.log(set);
let map; //<键，值>
map = new Map();
map.set("one", 1);
console.log(map);
